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Fire Resistant Flexible Coating - Trade Name: ASTRO FLEXI-COAT SEAL

CE Certification Flexi-Coat


UL CE and other certification logos.

CE Documents:

'DoP's = Declarators of Performance.

'CoC's = 'Certificates of Constancy'

TDS = Technical Data Sheet

Flexible fire resistant coating

DoP Astro Flexi Coat Seal

CoC Astro Flexi Coat Seal

TDS Astro Flexi Coat Seal

UL EU Documentation


  Installation Video

Product Images


Flexi-Coat is an ablative, highly advanced highly flexible coating for used to apply to uncoated stonewool boards to reinstate the fire resistance performance of wall and floor constructions where apertures are penetrated by single or multiple services. Flexi-Coat has been designed to be used in application where movement accommodation of +/- 25% is required. Flexi-Coat is idea for slab edge applications and movement seals.

Flexi-Coat is tested and Certified as part the Astroflame Fire Stopping range. When Flexi-Coat is applied to uncoated stonewool of the correct density it can be installed across a variety services and substrates.

Key Properties

Up to 2 hours fire resistance.

Smoke, acoustic, air and water barrier.

Offers 25% joint flexibility between -5 to +40 °C.

Tested in accordance with EN1366-3 : 2009.

Tested in accordance with EN1366-4 : 2009.

Fire Classification EN 13501-2.

Acoustic Isolation EN 10140.

Air Permeability EN 1026.

Water Permeability EN 1027.

Prevention of air leakage.

Ideal for slab edge applications and movement seals.

Ideal for spray, brush & pourable application.

Certifire Approval.

UL-EU Listed.

CE Marked.



Water based flexible acrylic coating




1.25 - 1.3 g/cm3

Cure Rate

0.5mm per day at 50% relative humidity 23°C

Tack Free

6hrs at 23°C, 50% RH

Coating Thickness

1mm Nominal, wet coating thickness

Fire Resistance/Insulation

EN 1366-4 EI 120 & EN 1366-3 EI 120


EN 13501-2

Acoustic Isolation

EN 10140 43dB when installed with 100mm thick 80kg/m2 stone wool.
EN 10140 52dB when installed with 200mm thick 80kg/m2 stone wool.

Air Permeability

600 Pa EN 1026 - 100Pa 0.4/1.5 m3/h/m2

Water Permeability

450 Pa EN 1027 - No Leakage

Container Size

7.4 Litre


500 cycles per 30 mins - 50% expansion and compression

Flexi-Coat has undertaken dynamic movements tests in excess of 500 per 30 mins cycles extending to 150mm and compressing to 80mm. After 1000 cycles there was no visible or physical deterioration of the Flexi-Coat.


Astro Flexi-Coat Seal: 7.4 Litre Pail, Colour White. For long term storage and ease of installation it is recommended that it should be stored indoors, in dry conditions. Storage temperature between -5°C and +25°C. Shelf life 12 months from date of manufacture.

Product Code

Product Description



Astro Flexi-Coat Seal


To Order & Specify

Please contact us and quote the following information - Please quote- Quantity / Product Code / Product Description
Typical wording- 5 / AFBFLEXICOAT / Astro Flexi-Coat Seal

>> Tel: +44 1329 844 500 or >> Email:

Fire Test & Assessment Reports

Tested in accordance with EN1366-4 : 2009
Fire Classification EN 13501-2
Certifire 3rd Party Accreditation
Acoustic Isolation EN 10140
Air Permeability EN 1026
Water Permeability EN 1027

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practices should be observed. For further information on health and safety requirements please contact the technical team on: tel +44 1329 844 500 or email



Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth

tel 0800 023 2482 (01329 844500)

fax 0800 023 2483 (01329 844600)

intl tel +44 1329 844500

intl fax +44 1329 844600